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Known Problem

Why doesn't KES work in Safe Mode? [KES for Windows]

This behavior is expected. We have no control over a system booting in Safe mode, because Safe mode is a special boot mode for OS diagnostics and repair. It is not possible to enable KES booting when Safe mode is running. However, booting in Safe mode can be disabled using GPOs or the local registry. It can be done by a local administrator. One of the ways to disable Safe Mode is described here.
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Known Problem

Why are not all browser extensions blocked by Application Control? [KES for Windows]

The Application Control component has a category called Browser extensions. There is a known limitation for it in Chrome. If an extension runs in an already running Chrome process (many of them run as newly started Chrome processes, especially for extension reasons), it cannot be blocked because it is not a newly started process and the extension itself is not an executable. It requires an .exe file to load. An extension that is already running cannot be blocked by application control (it h
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Known Problem

VMWare guest BSODs with a driver related stop code after installing or updating KES [KES for Windows]

Description VMWare guest using Kaspersky products hanging or crashing due to driver conflicts between drivers used by VMWare NSX (vnetWFP.sys, previously vnetflt.sys) and Network Threat Protection component. This problem is known to happen with following versions of KES and VMware Tools: KES 11.6 with VMWare Tools 10.0.9 KES 11.6 and 11.7 with VMWare Tools 11.3.5 KES 12 with VMWare Tools 10.1.7 Troubleshooting steps Update VMWare Tools Somet
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Known Problem

Virus Scan has not been performed for a long time [KES for Windows]

This article describes what is considered a Full Scan, which affects the KSC status "Virus Scan has not been performed for a long time". Scan task area settings There are two ways to set areas for a Scan task. Tasks started with any other settings (including Quick Scan and Critical Area Scan with default settings) will not be considered as a Full Scan.  Primary Kernel Memory Running processes and Startup Objects Disk boot sectors Local disk (logical di
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Known Problem

Update task completes successfully but bases remain outdated [Kaspersky Security for Windows Server]

Problem In some cases, it is possible to run a database upgrade task on the KSWS/KICS/KESS host, but despite the upgrade task successfully completing, the databases are still out of date. Solution Most probably product operates in UpdateBlackListOnly mode. This happens in cases when product is activated with activation code and is unable to reach our activation servers. Thus KSWS fails to receive/refresh activation ticket and downloads updates only for Blacklist. Possible way
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Known Problem

Trusted Applications [KES for Mac]

The KESMac 12 and the KESMac 11.3 patch C allows adding particular processes into the trusted section named Trusted Applications. The both filesystem and network activity of which can be ignored by the product increasing performance. Please, however, note that this could be potentially risky.  https://support.kaspersky.com/KESMac/11.3_adminguide/en-US/194142.htm Problem This article will describe a few ways to configure KES for Mac to exclude some of the software from th
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Known Problem

Trusted Applications [KES for Mac]

The KESMac 12 and the KESMac 11.3 patch C allows adding particular processes into the trusted section named Trusted Applications. The both filesystem and network activity of which can be ignored by the product increasing performance. Please, however, note that this could be potentially risky.  https://support.kaspersky.com/KESMac/11.3_adminguide/en-US/194142.htm Problem This article will describe a few ways to configure KES for Mac to exclude some of the software from th
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Known Problem

Trusted Applications [KES for Mac]

The KESMac 12 and the KESMac 11.3 patch C allows adding particular processes into the trusted section named Trusted Applications. The both filesystem and network activity of which can be ignored by the product increasing performance. Please, however, note that this could be potentially risky.  https://support.kaspersky.com/KESMac/11.3_adminguide/en-US/194142.htm Problem This article will describe a few ways to configure KES for Mac to exclude some of the software from th
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Known Problem

Tray icon appears twice or does not appear at all [KES for Windows]

Advice and Solutions (Forum Knowledgebase) Disclaimer. Read before using materials. This article is about Kaspersky Endpoint Security for Windows (KES for Windows) This problem has been observed in KES 11.5, but may apply to other versions as well. Problem Sometimes the KES tray icon behaves unexpectedly: it appears twice or does not appear at all (the icon next to the Windows clock). Solution Reset the tray icons: Open regedit; Go to HKEY
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Known Problem

Thunderbolt bridge connection does not work when Network Threat Protection is enabled [KES for Mac]

Scenario Enable Network Threat Protection Connect another Mac via a thunderbolt cable Try to send any data from one computer to another Connection times out Workaround & Solution Connect computers by other means or disable NTP when using Thunderbolt bridge. RCA This issue is caused by a bug in macOS' built-in packet filter and was reported to apple.
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Known Problem

The operation with application resources is blocked by Self-Defense [KES for Windows]

Advice and Solutions (Forum Knowledgebase) Disclaimer. Read before using materials. This article is about Kaspersky Endpoint Security for Windows (KES for Windows) This informational message does not mean that Self-Defense accuses any process of being under malware attack, it proactively blocks certain operations that could pose a potential threat to processes. The number of events depends on the activity of applications that inhabit the system, especially from their periodic acti
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Known Problem

Task's stop settings are not available in KSWS database update and scan tasks [Kaspersky Security for Windows Server]

Consider the following scenario: Open update or scan KSWS task.  Go to Schedule->Advanced→Task stop settings: Solution Task's stop settings are greyed out and cannot be changed. This is by design behaviour: Task stop settings can be changed only for real-time tasks  - Real-Time File Protection and Script Monitoring. These tasks can be configured in KSWS policy to pause the execution at certain time not to interfere with 3d apps or speed up heav
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Known Problem

SSH certificate import error during the "Install application remotely" task in KSC [KES for Linux]

Problem The "Install application remotely" task wizard presents an option to specify an SSH certificate as account credentials, if Linux package is selected for installation.  The wizard does not accept certain certificates and fails to provide informative error messages why this happens. Examples: Failed to upload the certificate. Failed to import the private key of the certificate. Root cause KSC 13.2 only accepts PEM certificates, they start with
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Known Problem

Report Folder consumes disk space more than 1 GB [Kaspersky Security for Windows Server]

Environment/Preconditions KSC - 12 KSWS - 11.0.1.897 You may find a massive increase in disk usage from the folder report under the Kaspersky folder. The size of the report folder will increase from around 2GB to 12GB, the files in the report folder have random name (like 340a13d9-2a50-4c4e-94d6-82a79d80da4b), which rapidly grows and consumes disk space. The file can be deleted to resolve the disk space full issue, which itself can cause many issues (can't log in to the server, KS
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Known Problem

Removable disk encryption doesn't work [KES for Windows]

Advice and Solutions (Forum Knowledgebase) Disclaimer. Read before using materials. This article is about Kaspersky Endpoint Security for Windows (KES for Windows)   Problem "Removable disk" Encryption is enabled and the policy applied to the machines, but nothing happens when the client connects USB drive.  Solution Encryption of the removable drives supports two modes: Encrypt entire removable drive: based on Kaspersky Full Disk Encryption (FDE), the entir
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Known Problem

OS hangs caused by excessive use of file descriptors [KES for Linux]

Symptoms OS hang, sometimes with open file errors in journals Customer application degrades with errors "unable to open file", "too many open files" Hangs and third-party (compatibility) issues often require advanced data collection and are sophisticated to investigate. However, a quick check is possible: On a system where KESL has worked for some time (not immediately after reboot/restart), validate the output of the following command, ran as root, for numerous records of /u
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Known Problem

OS hangs caused by excessive use of file descriptors [KES for Linux]

Symptoms OS hang, sometimes with open file errors in journals Customer application degrades with errors "unable to open file", "too many open files" Hangs and third-party (compatibility) issues often require advanced data collection and are sophisticated to investigate. However, a quick check is possible: On a system where KESL has worked for some time (not immediately after reboot/restart), validate the output of the following command, ran as root, for numerous r
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Known Problem

Linux programs remote execution using "Install application remotely" task in KSC [KES for Linux]

This only applies to KSC 14.2 and below Problem Remote installation tasks finishes with uninformative errors: Setup process error: Unknown error. (126) Setup process error: Unknown error. (2) Solution 1. Create 3rd party installation package (Create installation package -> Create an installation package for the specified executable file.) 2. Specify executable file, for example script.sh 3. Locate this package folder in KSC storage, by default %ProgramD
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Known Problem

Licensing and FDE functionality [KES for Windows]

Advice and Solutions (Forum Knowledgebase) Disclaimer. Read before using materials. This article is about Kaspersky Endpoint Security for Windows (KES for Windows)   There are two real-world scenarios related to KES FDE encryption and licensing that often result in unexpected behavior of encrypted devices: FDE encryption is used with the Advanced license and later replaced with the Select license (or any other license without encryption). Encryption license is expir
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Known Problem

KSWS spawns a lot of PR*.tmp files [Kaspersky Security for Windows Server]

Problem You might notice that large files named like PR*.tmp appear in C:\Windows\Temp. Cause This is known and expected behavior. When the product scans an object it creates a temporary copy, names it like PR*.tmp and places it in the temp folder.Once the scan is complete, this temporary file gets deleted. Large PR*.tmp files mean that some large objects are scanned by OAS (On-Access Scan) or ODS (On-Demand Scan). Solution In some cases there might be not enough sp
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Known Problem

KSWS frequent exploit and malware detections - troubleshooting [Kaspersky Security for Windows Server]

Problem KSWS detects certain exploit or malware frequently with N/A as an action in KSC reports. Solution 1. Download the latest patch for our product on the machine which detects the issue. 2. Download the latest Windows security updates on the machine to cover the potential vulnerabilities. 3. Make sure that the product has the latest updates from KLABs servers. 4. Check the events on the impacted server as sometimes KSC report shows "detection events" only with a
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Known Problem

KSWS Error sending the request to KSN 0x80000063 (0x80000500) [Kaspersky Security for Windows Server]

This error message means that KSWS KSN-Client was unable to reach KSN Cloud servers (in most cases if KSN Proxy is used). Possible causes of the issue: Various transport-level issues KSC Server has been moved to another host with new DNS-name and IP-address Troubleshooting steps: Check that KSC is accessible via both its IP address and its hostname Check that option "Bypass proxy for local addresses" is enabled (KSC server properties > Advanced > C
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Known Problem

KSWS corrupt installation [Kaspersky Security for Windows Server]

Problem If you found out that KSWS installations are somehow corrupted, and you're not able to remove it using conventional means (using misexec and/or appwiz.cpl), please do not use kavremover and/or mszap tools. Do not attempt removing the product manually as our goal is to determine the root cause of the product moving to this inconsistent state. Solution Please provide Kaspersky Support with the pertinent GSI log of the affected host and KSWS msi installer logs containing all
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Known Problem

KSWS Console removal fails with error 1336 [Kaspersky Security for Windows Server]

While removing Kaspersky Security for Windows Server Console removal log may contain a message: Error 1336. There was an error creating a temporary file that is needed to complete this installation. Folder: C:\Program Files (x86)\Common Files\Kaspersky Lab\Kaspersky Security for Windows Server\. System error code: 5 And if you launch removal process using an appwiz.cpl a popup will be displayed stating :  “There was an error creating a temporary file that is needed to complete
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